Term
| refers to the subjective impression about highness/lowness of a tone |
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Definition
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Term
20 hertz= infrasonic
20,000 hertz= ultrasonic |
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Definition
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Term
-in region of increased pressure in a longidul waves,
ex-when a door is opened this travels across a room.
region of reduced pressure in a longitudual wave
-ex' when a door is closed this this travels across a room. |
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Definition
- compression
-rarefaction |
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Term
| relative to solids and liquids is air a good conductor of sound |
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Definition
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Term
| can sound travel through a vacume_______ and if so why or why not? |
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Definition
-no
-because, there is nothinhg to compress and expand. |
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Term
| does air travel btter through cold/warm air, why |
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Definition
| warm air, warm air has faster moving molecules |
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Term
| when sound undergoes multiple reflections and persists after source has ceased emiting we hear ______ . |
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Definition
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Term
| study of sound properties |
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Definition
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Term
| when soumd goes through a medium and bend it is called |
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Definition
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Term
cool air always bends sound______
warm air bends sound _________ |
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Definition
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Term
| sound energy dissapates to thermal energy while sound travels in |
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Definition
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Term
when one holds a tuning fork to a table or fixed surface which produces a louder sound it is called __________.
-what is a device on musical instruments that allow them to have this feature |
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Definition
forced vibration.
-sounding board |
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Term
an object composed of an elstic material when disturbed will vibrate at its own special set of frequencies= its spracial sound.
-b/w a larger and smaller belll which produces more noise. |
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Definition
natural frequency
-smaller bell |
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Term
when the frequencys of forced vibrations on an object matchs the objects natural frequency this is called.
the force of the second fork on fig 20.14 is callled |
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Definition
resonance
-sympathetic vibration. |
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Term
| will resonance occur if the timing of pushs are off |
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Definition
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Term
this is the same as wave interference for sound.
crest to crest =
crest to through= |
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Definition
sound interference.
-increse.
-decrease. |
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Term
when speakers are far apart facing each other how vloud is the sound
when speakers are face to face how loud are they |
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Definition
-not as loud as properly phased speakers
-very little sound is heard. |
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Term
if one tuning fork undergoes 264 vibrations a second and another vibrates 262 per second they will be in step _____ each second.
avg frequency = |
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Definition
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